MAYBE
130.38/55.38	MAYBE
130.38/55.38	
130.38/55.38	Problem:
130.38/55.38	 a(x1) -> b(c(x1))
130.38/55.38	 a(c(b(x1))) -> b(a(a(c(x1))))
130.38/55.38	 b(b(x1)) -> x1
130.38/55.38	
130.38/55.38	Proof:
130.38/55.38	 Open
130.38/55.38	EOF